<template>
    <div class="app-header-sticky" :class="{ show: scrollY >= 78 }">
        <div class="container" v-show="scrollY > 78">
            <RouterLink class="logo" to="/" />
            <AppHeaderNav />
            <div class="right">
                <RouterLink to="/">品牌</RouterLink>
                <RouterLink to="/">专题</RouterLink>
            </div>
        </div>
    </div>
</template>

<script>
import AppHeaderNav from '@/components/AppHeaderNav'
import { useWindowScroll } from '@vueuse/core'
// import { onMounted, ref } from 'vue'
export default {
    name: 'AppHeaderSticky',
    components: {
        AppHeaderNav
    },
    setup() {
        // 传统DOM操作监听滚动条距离顶部高度
        // const scrollY = ref(0)
        // onMounted(() => {
        //     window.onscroll = () => {
        //         const scrollTop = document.documentElement.scrollTop
        //         console.log(scrollTop);
        //         scrollY.value = scrollTop
        //     }
        // })

        //基于vue3的组合Api的工具库
        const { y } = useWindowScroll()
        const scrollY = y
        return {
            scrollY
        }
    }
}
</script>

<style scoped lang='less'>
.app-header-sticky {
    width: 100%;
    height: 80px;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 999;
    background-color: #fff;
    border-bottom: 1px solid #e4e4e4;
    transform: translateY(-100%);
    opacity: 0;
    &.show {
        transition: all 0.3s linear;
        transform: none;
        opacity: 1;
    }
    .container {
        display: flex;
        align-items: center;
    }
    .logo {
        width: 200px;
        height: 80px;
        background: url(../assets/images/logo.png) no-repeat right 2px;
        background-size: 160px auto;
    }
    .right {
        width: 220px;
        display: flex;
        text-align: center;
        padding-left: 40px;
        border-left: 2px solid @xtxColor;
        a {
            width: 38px;
            margin-right: 40px;
            font-size: 16px;
            line-height: 1;
            &:hover {
                color: @xtxColor;
            }
        }
    }
}
</style>
